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submitted 6 days ago by fossilesque@mander.xyz to c/science_memes@mander.xyz

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[-] over_clox@lemmy.world 43 points 6 days ago

Its only a valve. Topologically speaking, the passage from the mouth to the anus only constitutes one hole.

The passage of air into the lungs is not a hole however, that is a cavity. Same difference with the vagina, that's not a hole, that's a cavity.

[-] GBU_28@lemm.ee 35 points 6 days ago

People are donuts!

[-] accideath@lemmy.world 23 points 6 days ago

No, since you have a nose. Topologically, people have 3 holes.

[-] chuckleslord@lemmy.world 17 points 5 days ago

7, if the cut-off is 60 microns (tear ducts). Smaller than that, we're essentially Swiss cheese.

[-] accideath@lemmy.world 8 points 5 days ago

Tbh, I was kinda hoping for someone with better biology knowledge than me to correct me. Thanks.

[-] coaxil@lemm.ee 2 points 5 days ago

What are the the 7?

[-] coffee_whatever@lemmy.world 7 points 5 days ago* (last edited 5 days ago)

Important note, if you take a straw that separates into two split straws (kinda in a "Y" shape) that from a topological point of view is two holes, because one is for one of these paths, and the other is an extruded hole on the side of the first path. In topology you can't break or mend material, but you can pull, stretch, squeeze and move it all you want. So you can move one of the split straw "legs" to the bottom of the whole straw, getting a shape similar to a "V", it would look pretty much like a pair of pants. And topologically speaking it would be exactly the same. So... One straight hole for your mouth all the way down to your anus. Another two are there for your nostrils, that's 3 already. The rest are for your tear ducts, which have two holes on the edge of your eye, (so four in total) which merge and then connect to your nose.

So a human, from a topological perspective, is just a seven holed doughnut. Also Vsauce made a great video about that, with pretty great animations.

[-] over_clox@lemmy.world 4 points 6 days ago* (last edited 6 days ago)

I am well aware that people have three topological holes. Matter of fact, I proved that years ago.

In this case, I only referred to one topological hole, from mouth to anus.

I never mentioned the nose, nor was that part of the topic in question.

[-] MBM 2 points 5 days ago

Matter of fact, I proved that years ago.

Ominous

[-] over_clox@lemmy.world 3 points 5 days ago

This fella explains it way better than I ever could..

https://youtube.com/watch?v=egEraZP9yXQ

[-] RedditRefugee69@lemmynsfw.com 1 points 5 days ago

Yum.

[-] match@pawb.social 2 points 6 days ago

why is the nose only one hole?

[-] accideath@lemmy.world 6 points 5 days ago

Nose is two. Your butt isn’t one. Or rather, your mouth and nostrils would be the entrance and your butt is the combined exit of those three holes. If you don’t count the nostrils, you only have one hole. A hole always goes through something, otherwise it’s just a cavity. And also, holes only count from one side. Your butt and mouth are the same hole, just from different ends.

[-] TexasDrunk@lemmy.world 8 points 5 days ago

Kissing with open mouths creates a hole from one butthole to another.

[-] over_clox@lemmy.world 2 points 5 days ago

Nose is only one hole, topologically speaking. You can run a string from one nostril to the other.

One topological hole.

[-] chuckleslord@lemmy.world 5 points 5 days ago

No, all 7 holes (nostrils, mouth, tear ducts) have a common cavity, so they're 7 holes not one.

https://youtu.be/egEraZP9yXQ

[-] over_clox@lemmy.world -1 points 5 days ago

This is a Wendy's. We only offer nostrils, mouths and anuses here.

[-] over_clox@lemmy.world 2 points 5 days ago

Nose is only one hole homie, runs from one nostril to the other. It takes the mouth to add a secondary orifilce. And it takes the anus to add a third orifice.

Topology for ya.

[-] accideath@lemmy.world 3 points 5 days ago

Doesn’t matter which way you turn it, the result is the same. As you count it, your first hole is nostril to nostril. I count mouth to anus as hole one and then add the left and right nostrils as secondary and tertiary orifices. Having a nose ads two holes to the total count. If you had no nose, you‘d have one hole, if you only had a nose, you’d also only have one hole.

[-] over_clox@lemmy.world 2 points 5 days ago

That reminds me, I need to turn my pizza soon..

[-] match@pawb.social 2 points 5 days ago

oh! but then why is it three holes and not nostril-to-mouth as a hole and other-nostril-to-butt as another hole, or some other combination

[-] yetAnotherUser@discuss.tchncs.de 5 points 5 days ago* (last edited 5 days ago)

Quick illustration:

Nostrils:
___________
_________  |
_________| |
_________  |
Mouth:   | |
\________| |
 ________  |
/        | |
         | |
         | |
         | |
         | | 
         | |
Butthole:

That is 3 holes in total because you can "connect" any opening with 3 different one's.

[-] match@pawb.social 3 points 5 days ago

thank you!!

[-] GBU_28@lemm.ee 1 points 6 days ago

You don't need that

[-] fossilesque@mander.xyz 2 points 6 days ago

Mmm

[-] merc@sh.itjust.works 2 points 5 days ago

Depends on the state of your esophagus, doesn't it? If it's closed (which it mostly is) then your mouth and nose holes go to your lung cavity. Your anus is also part of a cavity that goes through your intestines all the way up your throat and stops at your esophagus.

[-] pancake@lemmygrad.ml 2 points 6 days ago

No, the vagina is topologically a hole, as the uterus with the Fallopian tubes has two direct openings into the abdominal cavity (another objectionable "design" choice).